To fix this without an expensive trip to the service center, you need the Epson Adjustment Program (also known as a "Resetter") What is the Epson Adjustment Program?
The L6490 is fast, but sometimes paper feed calibration can drift. The adjustment program allows you to adjust the paper feed rate (PF Adjust) to ensure perfect alignment and stop banding issues in high-resolution prints. epson l6490 adjustment program top